scholarly journals Liver Transplant Patients with High Levels of Preoperative Serum Ammonia Are at Increased Risk for Postoperative Acute Kidney Injury: A Retrospective Study

2020 ◽  
Vol 9 (6) ◽  
pp. 1629
Author(s):  
Yoon Sook Lee ◽  
Yoon Ji Choi ◽  
Kyu Hee Park ◽  
Byeong Seon Park ◽  
Jung-Min Son ◽  
...  
Keyword(s):  
Acute Kidney Injury ◽  
Kidney Injury ◽  
Acute Kidney Injury Network ◽  
Ammonia Level ◽  
University Hospital ◽  
Transplant Patients ◽  
Preoperative Serum ◽  
Increased Risk ◽  
Serum Ammonia ◽  
Postoperative Aki

Acute kidney injury (AKI) is one of the most frequent postoperative complications after liver transplantation (LT). Increased serum ammonia levels due to the liver disease itself may affect postoperative renal function. This study aimed to compare the incidence of postoperative AKI according to preoperative serum ammonia levels in patients after LT. Medical records from 436 patients who underwent LT from January 2010 to February 2020 in a single university hospital were retrospectively reviewed. The patients were then categorized according to changes in plasma creatinine concentrations within 48 h of LT using the Acute Kidney Injury Network criteria. A preoperative serum ammonia level above 45 mg/dL was associated with postoperative AKI (p < 0.0001). Even in patients with a normal preoperative creatinine level, when the ammonia level was greater than 45 μg/dL, the incidence of postoperative AKI was significantly higher (p < 0.0001); the AKI stage was also higher in this group than in the group with preoperative ammonia levels less than or equal to 45 μg/dL (p < 0.0001). Based on the results of our research, an elevation in preoperative serum ammonia levels above 45 μg/dL is related to postoperative AKI after LT.

Association of preoperative hypoalbuminemia with postoperative acute kidney injury in patients undergoing brain tumor surgery: a retrospective study

2018 ◽  
Vol 128 (4) ◽  
pp. 1115-1122 ◽  
Author(s):  
Kyungmi Kim ◽  
Ji-Yeon Bang ◽  
Seon-Ok Kim ◽  
Saegyeol Kim ◽  
Joung Uk Kim ◽  
...  
Keyword(s):  
Acute Kidney Injury ◽  
Brain Tumor ◽  
Serum Albumin ◽  
Serum Albumin Level ◽  
Kidney Injury ◽  
Albumin Level ◽  
Tumor Surgery ◽  
Brain Tumor Surgery ◽  
Preoperative Serum ◽  
Postoperative Aki

OBJECTIVEHypoalbuminemia is known to be independently associated with postoperative acute kidney injury (AKI). However, little is known about the association between the preoperative serum albumin level and postoperative AKI in patients undergoing brain tumor surgery. The authors investigated the incidence of AKI, impact of preoperative serum albumin level on postoperative AKI, and death in patients undergoing brain tumor surgery.METHODSThe authors retrospectively reviewed the electronic medical records and laboratory results of 2363 patients who underwent brain tumor surgery between January 2008 and December 2014. Postoperative AKI was defined according to Kidney Disease: Improving Global Outcomes Definition and Staging (KDIGO). Multivariate logistic regression analysis was used to identify demographic, preoperative laboratory, and intraoperative factors associated with AKI development. Cox proportional hazards models were used to investigate the adjusted odds ratio and hazard ratio for the association between preoperative serum albumin level and outcome variables.RESULTSThe incidence of AKI was 1.8% (n = 43) using KDIGO criteria. The incidence of AKI was higher in patients with a preoperative serum albumin level < 3.8 g/dl (3.5%) than in those with a preoperative serum albumin level ≥ 3.8 g/dl (1.2%, p < 0.001). The overall mortality was also higher in the former than in the latter group (5.0% vs 1.8%, p < 0.001). After inverse probability of treatment-weighting adjustment, a preoperative serum albumin level < 3.8 g/dl was also found to be associated with postoperative AKI (OR 1.981, 95% CI 1.022–3.841; p = 0.043) and death (HR 2.726, 95% CI 1.522–4.880; p = 0.001).CONCLUSIONSThe authors’ results demonstrated that a preoperative serum albumin level of < 3.8 g/dl was independently associated with AKI and mortality in patients undergoing brain tumor surgery.

scholarly journals Association of Intraoperative Hypotension with Acute Kidney Injury after Noncardiac Surgery in Patients Younger than 60 Years Old

2019 ◽  
Vol 44 (2) ◽  
pp. 211-221 ◽  
Author(s):  
Yongzhong Tang ◽  
Chaonan Zhu ◽  
Jiabin Liu ◽  
Anli Wang ◽  
Kaiming Duan ◽  
...  
Keyword(s):  
Acute Kidney Injury ◽  
Primary Outcome ◽  
Kidney Injury ◽  
Noncardiac Surgery ◽  
Intraoperative Hypotension ◽  
Outcome Relationship ◽  
Increased Risk ◽  
Interaction Factor ◽  
Surgical Duration ◽  
Postoperative Aki

Background/Aims: Intraoperative hypotension (IOH) may be associated with surgery-related acute kidney injury (AKI). However, the duration of hypotension that triggers AKI is poorly understood. The incidence of AKI with various durations of IOH and mean arterial pressures (MAPs) was investigated. Materials: A retrospective cohort study of 4,952 patients undergoing noncardiac surgery (2011 to 2016) with MAP monitoring and a length of stay of one or more days was performed. The exclusion criteria were a preoperative estimated glomerular filtration (eGFR) ≤60 mL min–1 1.73 m2–1, a preoperative MAP less than 65 mm Hg, dialysis dependence, urologic surgery, age older than 60 years, and a surgical duration of less than 60 min. The primary exposure was IOH, and the primary outcome was AKI (50% or 0.3 mg dL–1 increase in creatinine) during the first 7 postoperative days. Multivariable logistic regression was used to model the exposure-outcome relationship. Results: AKI occurred in 186 (3.76%) noncardiac surgery patients. The adjusted odds ratio for surgery-related AKI for a MAP of less than 55 mm Hg was 14.11 (95% confidence interval: 5.02–39.69) for an exposure of more than 20 min. Age was not an interaction factor between AKI and IOH. Conclusion: There was a considerably increased risk of postoperative AKI when intraoperative MAP was less than 55 mm Hg for more than 10 min. Strict blood pressure management is recommended even for patients younger than 60 years old.

scholarly journals Renin–angiotensin system blocker use and the risk of acute kidney injury after colorectal cancer surgery: a population-based cohort study

BMJ Open ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. e032964
Author(s):  
Charlotte Slagelse ◽  
H Gammelager ◽  
Lene Hjerrild Iversen ◽  
Kathleen D Liu ◽  
Henrik T Toft Sørensen ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Acute Kidney Injury ◽  
Cohort Study ◽  
Angiotensin Receptor Blockers ◽  
Kidney Injury ◽  
Population Based ◽  
Adjusted Risk ◽  
Increased Risk ◽  
The Impact ◽  
Postoperative Aki

ObjectivesIt is unknown whether preoperative use of ACE inhibitors (ACE-I) or angiotensin receptor blockers (ARBs) affects the risk of acute kidney injury (AKI) after colorectal cancer (CRC) surgery. We assessed the impact of preoperative ACE-I/ARB use on risk of AKI after CRC surgery.DesignObservational cohort study. Patients were divided into three exposure groups—current, former and non-users—through reimbursed prescriptions within 365 days before the surgery. AKI within 7 days after surgery was defined according to the current Kidney Disease Improving Global Outcome consensus criteria.SettingPopulation-based Danish medical databases.ParticipantsA total of 9932 patients undergoing incident CRC surgery during 2005–2014 in northern Denmark were included through the Danish Colorectal Cancer Group Database.Outcome measureWe computed cumulative incidence proportions (risk) of AKI with 95% CIs for current, former and non-users of ACE-I/ARB, including death as a competing risk. We compared current and former users with non-users by computing adjusted risk ratios (aRRs) using log-binomial regression adjusted for demographics, comorbidities and CRC-related characteristics. We stratified the analyses of ACE-I/ARB users to address any difference in impact within relevant subgroups.ResultsTwenty-one per cent were ACE-I/ARB current users, 6.4% former users and 72.3% non-users. The 7-day postoperative AKI risk for current, former and non-users was 26.4% (95% CI 24.6% to 28.3%), 25.2% (21.9% to 28.6%) and 17.8% (17.0% to 18.7%), respectively. The aRRs of AKI were 1.20 (1.09 to 1.32) and 1.16 (1.01 to 1.34) for current and former users, compared with non-users. The relative risk of AKI in current compared with non-users was consistent in all subgroups, except for higher aRR in patients with a history of hypertension.ConclusionsBeing a current or former user of ACE-I/ARBs is associated with an increased risk of postoperative AKI compared with non-users. Although it may not be a drug effect, users of ACE-I/ARBs should be considered a risk group for postoperative AKI.

scholarly journals Incidence of Acute Kidney Injury in Critically Ill Patients Receiving Vancomycin with Concomitant Piperacillin-Tazobactam, Cefepime, or Meropenem

2019 ◽  
Vol 63 (5) ◽  
Author(s):  
Adam M. Blevins ◽  
Jennifer N. Lashinsky ◽  
Craig McCammon ◽  
Marin Kollef ◽  
Scott Micek ◽  
...  
Keyword(s):  
Acute Kidney Injury ◽  
Critically Ill ◽  
Critically Ill Patients ◽  
Retrospective Cohort ◽  
Primary Outcome ◽  
Independent Predictor ◽  
Kidney Injury ◽  
University Hospital ◽  
Increased Risk ◽  
Kdigo Guidelines

ABSTRACT Critically ill patients are frequently treated with empirical antibiotic therapy, including vancomycin and β-lactams. Recent evidence suggests an increased risk of acute kidney injury (AKI) in patients who received a combination of vancomycin and piperacillin-tazobactam (VPT) compared with patients who received vancomycin alone or vancomycin in combination with cefepime (VC) or meropenem (VM), but most studies were conducted predominately in the non-critically ill population. A retrospective cohort study that included 2,492 patients was conducted in the intensive care units of a large university hospital with the primary outcome being the development of any AKI. The rates of any AKI, as defined by the Kidney Disease: Improving Global Outcomes (KDIGO) guidelines, were 39.3% for VPT patients, 24.2% for VC patients, and 23.5% for VM patients (P < 0.0001 for both comparisons). Similarly, the incidences of stage 2 and stage 3 AKI were also significantly higher for VPT patients than for the patients in the other groups. The rates of stage 2 and stage 3 AKI, respectively, were 15% and 6.6% for VPT patients, 5.8% and 1.8% for VC patients, and 6.6% and 1.3% for VM patients (P < 0.0001 for both comparisons). In multivariate analysis, the use of vancomycin in combination with piperacillin-tazobactam was found to be an independent predictor of AKI (odds ratio [OR], 2.161; 95% confidence interval [CI], 1.620 to 2.883). In conclusion, critically ill patients receiving the combination of VPT had the highest incidence of AKI compared to critically ill patients receiving either VC or VM.

Caution: Increased Acute Kidney Injury in Enhanced Recovery after Surgery (ERAS) Protocols

2019 ◽  
Vol 85 (2) ◽  
pp. 156-161 ◽  
Author(s):  
Crystal P. Koerner ◽  
Alexandra G. Lopez-Aguiar ◽  
Mohammad Zaidi ◽  
Shelby Speegle ◽  
Glen Balch ◽  
...  
Keyword(s):  
Acute Kidney Injury ◽  
Colorectal Surgery ◽  
Enhanced Recovery ◽  
Enhanced Recovery After Surgery ◽  
Kidney Injury ◽  
Morbidity And Mortality ◽  
Elective Colorectal Surgery ◽  
Baseline Serum ◽  
Increased Risk ◽  
Postoperative Aki

Minimizing perioperative fluid administration is a key component of enhanced recovery after surgery protocols (ERAS). Acute kidney injury (AKI) is a major cause of morbidity and mortality in hospitalized patients. Our aim was to assess the association of ERAS with the incidence and severity of AKI in patients undergoing elective colorectal surgery. In this single-study retrospective review, patients undergoing colorectal surgery from 2013 to 2017 were included. Primary endpoint was postoperative AKI. Secondary outcomes were hospital length of stay (LOS) and 30-day readmission. Baseline demographics and procedure types were similar between both groups. AKI was higher in the ERAS versus non-ERAS group (23 vs 9%; P = 0.002). Factors associated with increased risk of AKI on univariate regression included presence of preoperative cardiovascular risk factors (hazard ratio (HR) 3.5; 95% CI 1.3–9.7; P < 0.01), more complex colorectal operations (HR 5.1; 95% CI 1.6–16.1; P < 0.01), and management with an ERAS pathway (HR 2.9; 95% CI 1.5–5.8; P < 0.01). On multi-variable analysis, ERAS remained a significant risk factor for developing AKI (HR 3.44; 95% CI 1.5–7.7; P < 0.01). ERAS patients had a shorter hospital LOS (3.9 vs 5.9 days, P < 00.1) compared with non-ERAS patients, with no difference in 30-day readmission rates (11.5 vs 10.7%; P = 0.98). Although the incidence of AKI is higher in patients treated with ERAS protocols, the majority represent minor elevations in baseline serum creatinine and did not affect the reduction in hospital LOS associated with ERAS. Given the potential association of AKI, however, with increased long-term morbidity and mortality, ERAS protocols should be optimized to prevent postoperative AKI.

scholarly journals Association of Early and Late Contrast-Associated Acute Kidney Injury and Long-Term Mortality in Patients Undergoing Coronary Angiography

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Zhubin Lun ◽  
Jin Liu ◽  
Liwei Liu ◽  
Jingjing Liang ◽  
Guanzhong Chen ◽  
...  
Keyword(s):  
Acute Kidney Injury ◽  
Coronary Angiography ◽  
Cox Regression ◽  
Late Phase ◽  
Kidney Injury ◽  
Rank Test ◽  
Preoperative Serum ◽  
Increased Risk ◽  
Long Term Mortality

Background. Contrast-associated acute kidney injury (CA-AKI) is a common complication in patients undergoing coronary angiography (CAG). However, few studies demonstrate the association between the prognosis and developed CA-AKI in the different periods after the operation. Methods. We retrospectively enrolled 3206 patients with preoperative serum creatinine (Scr) and at least twice SCr measurement after CAG. CA-AKI was defined as an increase ≥50% or ≥0.3 mg/dL from baseline in the 72 hours after the procedure. Early CA-AKI was defined as having the first increase in SCr within the early phase (<24 hours), and late CA-AKI was defined as an increase in SCr that occurred for the first time in the late phase (24–72 hours). The first endpoint of this study was long-term all-cause mortality. Kaplan–Meier analysis was used to count the cumulative mortality, and the log-rank test was used to assess differences between curves. Univariate and multivariate cox regression analyses were performed to assess whether patients who developed different type CA-AKI were at increased risk of long-term mortality. Results. The number of deaths in the 3 groups was 407 for normal (12.7%), 106 for early CA-AKI (32.7%) and 57 for late CA-AKI (17.7%), during a median follow-up period of 3.95 years. After adjusting for important clinical variables, early CA-AKI (HR = 1.33, 95% CI: 1.02–1.74, P = 0.038 ) was significantly associated with mortality, while late CA-AKI (HR = 0.92, 95% CI: 0.65–1.31, P = 0.633 ) was not. The same results were found in patients with coronary artery disease, chronic kidney disease, diabetes mellitus, and percutaneous coronary intervention. Conclusions. Early increases in Scr, i.e., early CA-AKI, have better predictive value for long-term mortality. Therefore, in clinical practice, physicians should pay more attention to patients with early renal injury related to long-term prognosis and give active treatment.

scholarly journals Preoperative hypoalbuminemia was associated with acute kidney injury in high-risk patients following non-cardiac surgery: a retrospective cohort study

2019 ◽  
Author(s):  
Nan Li ◽  
Hong Qiao ◽  
Jing-Fei Guo ◽  
Hong-Yun Yang ◽  
Xue-Ying Li ◽  
...  
Keyword(s):  
Acute Kidney Injury ◽  
Logistic Regression ◽  
Cardiac Surgery ◽  
Serum Albumin ◽  
Multivariate Logistic Regression Analysis ◽  
Kidney Injury ◽  
Albumin Concentration ◽  
Multivariate Logistic Regression ◽  
Preoperative Serum ◽  
Postoperative Aki

Abstract Background: Acute kidney injury (AKI) is a common complication following non-cardiac surgery with adverse short- and long- term morbidity and mortality. Evidence shows that hypoalbuminemia is associated with increased AKI risk in patients with infectious diseases and cancer and following cardiac surgery and transplant surgery. However, little evidence is available on non-cardiac surgery population. Thus, we investigated the association between preoperative hypoalbuminemia and AKI following non-cardiac surgery. Methods: We retrospectively assessed perioperative risk factors and preoperative serum albumin concentration in 729 consecutive adult patients who underwent non-cardiac surgery from July 1, 2017, to June 30, 2018. Each patient was categorized according to maximal Kidney Disease Improving Global Outcomes criteria based on creatinine changes and urine output within the first week after surgery. Multivariate Logistic regression models were used to analyze the association between preoperative hypoalbuminemia and postoperative AKI. Results: Of 729 patients, 188 (25.8%) developed AKI. AKI incidence was higher in patients with preoperative serum albumin <37.5 g/L than in those with preoperative serum albumin ≥37.5 g/L [35.9% (98/273) vs. 19.7% (90/456), P<0.001]. Multivariate logistic regression analysis showed that preoperative serum albumin <37.5 g/L (odds ratio 1.892; 95% confidence interval 1.238-2.891; P=0.003) was independently associated with postoperative AKI. Patients with preoperative serum albumin <37.5 g/L tended to have a higher but not significant ratio in AKI stage 2 (2.6% vs 1.1%, P=0.144) and much higher ratio in AKI stage 3 (4.8% vs 0.7%, P<0.001) than those with preoperative serum albumin ≥37.5 g/L. AKI patients had a higher in-hospital mortality rate [6.9% (13/188) vs. 0.2% (1/541), P<0.001]. Kaplan-Meier analysis revealed that the cumulative survival rate decreased with increasing AKI severity (P<0.001). Postoperative AKI was also associated with other worse outcomes, such as prolonged mechanical ventilation [53.4 (33.0, 73.8) vs 14.7 (11.1, 18.3) hours, P<0.001], intensive care unit stay [4.0 (3.1, 4.9) vs 2.0 (1.8, 2.3) days, P<0.001], postoperative hospital stay [17.8 (14.8, 20.9) vs 12.3 (11.3, 13.3) days, P<0.001], and higher total cost [13,453 (8,538, 20,228) vs 11,306 (6,277, 16,400) dollars, P<0.001]. Conclusions: Preoperative hypoalbuminemia was independently associated with AKI after non-cardiac surgery, and postoperative AKI was associated with poor outcomes.

scholarly journals Diagnostic Performance of Cyclophilin A in Cardiac Surgery-Associated Acute Kidney Injury

2019 ◽  
Vol 9 (1) ◽  
pp. 108 ◽  
Author(s):  
Cheng-Chia Lee ◽  
Chih-Hsiang Chang ◽  
Ya-Lien Cheng ◽  
George Kuo ◽  
Shao-Wei Chen ◽  
...  
Keyword(s):  
Acute Kidney Injury ◽  
Cardiac Surgery ◽  
Early Detection ◽  
Tertiary Care ◽  
Laboratory Data ◽  
Kidney Injury ◽  
Cyclophilin A ◽  
University Hospital ◽  
Surgical Intensive Care ◽  
Postoperative Aki

Acute kidney injury (AKI) is associated with increased morbidity and mortality and is frequently encountered in cardiovascular surgical intensive care units (CVS-ICU). In this study, we aimed at investigating the utility of cyclophilin A (CypA) for the early detection of postoperative AKI in patients undergoing cardiac surgery. This was a prospective observational study conducted in a CVS-ICU of a tertiary care university hospital. All prospective clinical and laboratory data were evaluated as predictors of AKI. Serum and urine CypA, as well as urine neutrophil gelatinase-associated lipocalin (uNGAL), were examined within 6 h after cardiac surgery. The discriminative power for the prediction of AKI was evaluated using the area under the receiver operator characteristic curve (AUROC). We found that both serum CypA and urine CypA were significantly higher in the AKI group than in the non-AKI group. For discriminating AKI and dialysis-requiring AKI, serum CypA demonstrated acceptable AUROC values (0.689 and 0.738, respectively). The discrimination ability of urine CypA for predicting AKI was modest, but it was acceptable for predicting dialysis-requiring AKI (AUROC = 0.762). uNGAL best predicted the development of AKI, but its sensitivity was not good. A combination of serum CypA and uNGAL enhanced the overall performance for predicting the future development of AKI and dialysis-requiring AKI. Our results suggest that CypA is suitable as a biomarker for the early detection of postoperative AKI in CVS–ICU. However, it has better discriminating ability when combined with uNGAL for predicting AKI in CVS-ICU patients.

scholarly journals Risk Factors and Outcomes of Acute Kidney Injury in Neonates with Persistent Pulmonary Hypertension of the Newborn

2021 ◽  
Author(s):  
Nuran Üstün ◽  
Fahri Ovalı
Keyword(s):  
Risk Factors ◽  
Mechanical Ventilation ◽  
Acute Kidney Injury ◽  
Pulmonary Hypertension ◽  
Neonatal Intensive Care ◽  
Kidney Injury ◽  
University Hospital ◽  
Persistent Pulmonary Hypertension ◽  
Increased Risk ◽  
Stage 1

Objective: To identify the incidence of and risk factors for acute kidney injury (AKI) in neonates with persistent pulmonary hypertension of the newborn (PPHN) and to evaluate its association with neonatal outcomes. Method: A total of 78 newborns with confirmed PPHN admitted to the neonatal intensive care unit of a university hospital between 2016 and 2020 were retrospectively analyzed. AKI was defined according to the modified neonatal Kidney Disease: Improving Global Outcomes criteria. Results: Of 78 PPHN infants, AKI was found in 29.5% (23/78). Multivariate analysis indicated that male sex (OR 3.43 95% CI 1.03-11.48, p=0.04) and severe PPHN (OR 5.67 95% CI 1.55- 20.68, p<0.01) were independently associated with increased risk for AKI. Infants with AKI had significantly higher mortality rate than infants without AKI (43.5% vs. 9.1%, p<0.01). Mortality rates in stage 1, stage 2 and stage 3 AKI were similar (36.4%, 57.1%, and 40%, respectively, p=0.68). Among survivors, AKI infants had significantly longer mechanical ventilation and lenght of stay than infants without AKI. Conclusion: In infants with PPHN, AKI is a common complication and is associated with increased mortality, and longer mechanical ventilation and lenght of stay. Careful monitoring of kidney function in infants with PPHN, especially in males and those who had severe PPHN can help to improve patient outcomes.

scholarly journals Preoperative hypoalbuminemia was associated with acute kidney injury in high risk patients following non-cardiac surgery: a retrospective cohort study

2019 ◽  
Author(s):  
Nan Li ◽  
Hong Qiao ◽  
Jing-Fei Guo ◽  
Hong-Yun Yang ◽  
Xue-Ying Li ◽  
...  
Keyword(s):  
Acute Kidney Injury ◽  
Logistic Regression ◽  
Cardiac Surgery ◽  
Serum Albumin ◽  
Serum Albumin Level ◽  
Kidney Injury ◽  
Albumin Level ◽  
Multivariate Logistic Regression ◽  
Preoperative Serum ◽  
Postoperative Aki

Abstract Background Acute kidney injury (AKI) is a common complication following non-cardiac surgery with adverse short and long term prognosis. Current evidence have shown hypoalbuminemia was associated with an increased risk of AKI in patients with infectious diseases, cancer, following cardiac surgery and transplant surgery. However, there were few evidence focusing on non-cardiac surgery population. The purpose of this study was to investigate the association between preoperative hypoalbuminemia and AKI following non-cardiac surgery. Methods We retrospectively assessed perioperative risk factors and preoperative serum albumin in 729 consecutive adult patients who underwent non-cardiac surgery from July 1, 2017 to June 30, 2018. Each patient was categorized by maximal Kidney Disease Improving Global Outcomes criteria based on creatinine changes and urine output within first week after surgery. Multivariate Logistic regression models were used to analyze the association between preoperative hypoalbuminemia and postoperative AKI. Results Of the 729 patients, 188 (25.8%) developed AKI, the AKI incidence was higher in patients with a preoperative serum albumin level < 37.5g/L than those ≥37.5g/L [35.9% (98/273) vs. 19.7% (90/456), P <0.001]. Multivariate Logistic regression analysis showed preoperative serum albumin level < 37.5g/L (OR 1.892; 95% CI 1.238-2.891; P = 0.003) was independently associated with postoperative AKI. Furthermore, AKI in patients with preoperative hypoalbuminemia was more severe with 28.6% vs 18.0% for stage 1 (P=0.001), 2.6% vs 1.1% for stage 2 (P=0.144) and 4.8% vs 0.7% for stage 3 (P<0.001), respectively. Patients with AKI had a higher in-hospital mortality rate [6.9% (13/188) vs. 0.2% (1/541), P <0.001]. By Kaplan-Meier analysis, patients with AKI had lower cumulative survival rate with more severe stage of AKI relating to poorer outcomes (P<0.001). Postoperative AKI was also associated with other worse outcomes, such as prolonged mechanical ventilation [53.4 (33.0, 73.8) vs 14.7 (11.1, 18.3) hours, P<0.001], ICU stay [4.0 (3.1, 4.9) vs 2.0 (1.8, 2.3) days, P<0.001] and postoperative hospital stay [17.8 (14.8, 20.9) vs 12.3 (11.3, 13.3) days, P<0.001], and higher total cost [89,000 (56,000, 132,000) vs 75,000 (42,000, 109,000) yuan, P<0.001]. Conclusions Preoperative hypoalbuminemia was independently associated with AKI after non-cardiac surgery, and postoperative AKI was associated with poor outcomes.

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